Anecdotal experience in our clinic suggests a recent reduction in cases of pubic lice despite increased patient numbers and increasing prevalence rates of other sexually transmitted infections (STIs). Also, in recent years we have seen an increasing number of patients who have undergone extensive pubic hair removal procedures, such as the "Brazilian." Could there be an association between the rates of pubic lice and the introduction of pubic hair removal practices?

Then there's that 1969 classic Catnip and the alteration of consciousness and the 1997 followup in Veterinary and Human Toxicology , Catnip and the alteration of human consciousness. (the jury is still out; there is that one vexing toddler whose obtundation was not attributable to any other cause).